Preformed rail filler



April 15, 1930. A. c. FISCHER PREFORMED RAIL FILLER Filed June 50, 1927 Jfiri 625667266 44/ ALBERT c. FISCHER, OF CHICAGO, rumors, essrsnon ro 'rnn PHILIP CAREY MANU tion with the v Patented Apr. 1 1930 FAGTURING COMPANY, A conronn'rron or OHIO,

, iennronmnn RAIL FILL-ER application filed June My invention relates to'a preformed rail filler comprising aprepared strip of waterproofing material,- "p'referablybituminous material or other "suitable binder shapedto conform to the outline of the rail on one side and suitably faced for contact'withv the paving on the'other side, the strip being adapted to actas insulating, sound-deadening, and expansion materiah deadening the sound ofthe car upon the rail and insulating the track fromthe adjacent paving material and taking 'upexpansion and contraction; between th m I .c p i I g My invention is concerned more with the substance out of which the'strips are made rather than to their particular form.

One of the objects of my, invention resides in providing a preformed rail filler comprising waterproofing binder and linear fibres which are suitably interlocked or felted together, not only "to as'sistin the insulating and sound deadening characteristics of the strip and providing an 'efijcient flow retarder for the"'compressible waterproofing binder,

such as bituminous material, but also providing an eiiicient structural reinforcing -medimin for the rail filler,'and in addition considerably to augment the expansibility and, compressibility and sound deadening, efficiency of the strip. I

These and other objects .of my invention will beapparent from a 'perusalof'the following specification when taken" in connec- I accompanying drawings, wherein, 1

Figures '1 tot} inclusive illustrate various designs of's trips which may be used singly or collectively in connection with a rail after the manner illustrated and claimed in an ap- ,plic ation filed. January 6,1926, by WV.

Herbst, Serial'fNo; 79,543. i

It is understood that any of the blocks or 1 strips shown in the application aforesaid, or

anyrother type of strip may be availed of, the present invention being concerned with the material of which the rail filler strips are composed. I

' In this invention I propose to form my rail filler of a mixture of waterproofing ma- -terial, such as, bituminous material, preferponent of my rail filler.

192v. Serial no. 202,581.

ably blown bituminous material, and inter; locking linear fibres of any desired type; they must hav'elength' as distinguished from finely divided material which constitutes the cheap filler and flowretarder at present be ing used. The linear fibres are suitably mixed with the bituminous material when trusion and provides a cheap filler. 7 These ,7 earthy materlalsmay include limestone dust,

slate particles,'infusorial earth, clay and others, and may be used inamounts from ten to twenty percent. The interlocking-linear fibres which ar used in my present invention are of any kind I provided they have length as distinguished from sawdust, shredded wood, granular fibrous material and the like, which latter con stltute a cheap filler but lack the-reinforcing qual ties which provide a most valuable comlinear fibres improve the sound deadening In addition the,

qualities, whereas the finely divided cheap fillers heretofore used detract from the sound deadening qualities of the filler.

The great value of my improved rail filler'f as differing from types 'heretoforedisclbsed,

kind provided they have length so as to "permit them to interlock when mixed with the waterproof binder. i

In certain instances I propose touse fibres that are cellular in nature. Excelsiorifibres are an example of such cellularfibres.

In certam instances also I can prepare my I c, k 100 preferred rail'filler'whereinthe linearfibres nous binder will thoroughly saturate thefibres.

In another sense, I can form the rail filler either saturated or unsaturated with thebinder. For instance, I do not use this term saturated solely to convey the idea that the fibres of mineral wool or asbestos and the like are saturated. As a matter of fact, it is v substantially impossible to saturate mineral wool'or asbestos fibres, .but'when these fibres are felted, the interstices formed by the loosely matted fibresmay perhaps be filledso that the filled structurebecomes saturated. By simply loosely felting the fibres into a blocklike structure, I am able to fill the mass with the waterproofing substance so that a great many of the fibres are separated from each other by a substantial thickness of waterproofing material.

As a modified form, in the event that I desire to produce a very much lighter structure, I use the waterproofing substancein a very much thinner consistency, so that the surplus drains off and thus leaves unfilled intersticesbetween the fibres. This produces a cellular construction. v

Should I desire to produce a cellular structure, but. with the fibres more closely compacted, I express the surplus :saturant and. thus leave acellular structure with the fibres more closely compacted. r

I have discovered that mineral woolfibres are cellular, and excelsioriand other fibres are also cellular. Consequently I think it bestto make somedistinction betweena structure inwhich the cells arederived from leavin'g interstices between the; fibres when thesame'arefelted and a structure in which the fibres themselves are cellular. In this connection I call attention to the factthat by,

using mineral wool, or other fibreswhichare cellular, I. may still produce a cellular structure and at the same time fillthe interstices.

between. the fibres in the matted mass. On the other hand, if I do not fill thelinterstices between the fibres in the mattedmass, I increase. the cells in the structure so thata very highly compressible matted'structure is produced. With these. conclusionsit will be seen that by mixing cellular fibres.- anda goodly quantity of waterproofing substance," r such as asphalt, in .the,hot plastic state, vII produce amore or. less solid structure and; at,

the same time take advantage of the cells in the fibres to develop a more or less high degree of compressibility and expansibility.

On the other hand, by using a very light waterproofingsaturant I can increase this compressibility and expansibility bysimply matting the fibrestogether and leaving the interstices to develop the cell structure and also take advantage of the cells in the fibres themselves.

7 As a modification by usingcellular fibres and highly heated bituminous material the latter will saturate the cells of, the fibres,

It'can readily be understood that the incorporation of the described interlocking linear fibrous material in the waterproofing or b1- tuminous material will insulate any of the granite, concrete or brick paving over the rail, and the fibrous structure will take up.-

the sound and prevent its transmission from the rail to the hard paving substances. Furthermore, the binder, with the aid of the interlockingflinear fibres will also provide a suitable expansionjoint, dueto the compressible qualities not only ofthe bituminous. ma-

terial but also due to the resiliency of the fibrous material mixed therewith andparticularly when the fibrous material is in an unsaturated state as hereinbefore stated.

I claim:

1. A preformed rail filler adapted as an expansion, sound deadening and insulating material, comprising a waterproof binder, linear fibres, and slate particles.

2. A preformed rail filler adapted as an expansion, sound deadening and insulating 'material, comprising a waterproof binder,

linear fibres and earthy material, saidfibres being interlaced to reenforce the binder.

3. A preformed rail filler adapted as an expansion,.sound deadening and insulating material, comprising bituminous material-and interlockedlinear fibres not exceeding twentyfive per cent.

4. A preformed rail filler adapted an ex pansion, sound deadening and insulating mater1al, compr1s1ng bituminous material, interlockedlinear fibres, and earthy material in amount from ten to twenty per cent.v

5.'A preformed rail filler adapted as an expansion, sound deadeningand insulating material, comprising a bituminous binder, linear fibres, and slate-particles.

6. A preformed railfiller adaptedas an expansion joint, sound deadener and insulating material, comprising a bituminous binder, linear fibers and earthy materiahisaid fibres being interlaced to reenforce the bituminous binder. 7

Signed at Chicago, Illinois, this lfith day ofJune,1927." 1 y A J ALBERT C. FISCHER. 

